The body’s ph is tightly regulated because specific enzymes function best within a narrow ph range. what is the approximate ph of a 1.2 × 10–5 m aqueous solution of naoh?

9.08

Explanation:

pOH is defined as the negative logarithm of the concentration of hydroxide ions.

Thus,  

pOH = - log [OH⁻]

Given that:- [OH⁻]  = 1.2 × 10⁻⁵ M

Putting in the above equation as:-

pOH = - log 1.2 × 10⁻⁵ = 4.92

Also, pH + pOH = 14  

So, pH = 14 - 4.92 = 9.08

pH scale generally runs from 1 to 14 where pH = 7 represents neutral medium, pH < 7 represents acidic medium and pH > 7 represents basic medium.